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Annual return is £75 000 – £28 000 + £4 000 = £51 000 Return on investment = annual return x 100 = £51 000 x 100 = initial cost £220 000 Answer = 23.2% or 23%

(x + 2)²+3

Let's remember what applying a modulus to any number actually does. Applying the modulus to a number just gives us back the positive version of that number- if it is positive, we get back itself, and if i...

Semi-conservative replication refers to replication of DNA in which the newly produced DNA molecules will contain 1 strand from the original DNA and a another strand that had been newly synthesised. In or...

             1) X2 +2Y2= 18 2) X - Y = 3   Rearrange 2) in the form X=3-Y then substitute in to 1); (3-y)2 +2Y2=18, this is your new equation 3 9+3Y+3Y+Y2+2Y2=18 3) 9+6y+3Y2= 18 Divide equation 3) by 3 3 ...